# versionString The OpenSSL version string compiled into this package’s `libcrypto`. ``` static var versionString: String { get } ``` ## Return Value A human-readable string beginning with the literal `"OpenSSL "` followed by the version triple and build date. Use `String.hasPrefix(_:)` to gate on the major version. ## Discussion The value comes from [`OpenSSL_version(OPENSSL_VERSION)`](https://docs.openssl.org/3.6/man3/OpenSSL_version/) and takes the form `"OpenSSL x.y.z "` — for example `"OpenSSL 3.6.2 14 Nov 2025"`. Cross-reference the major/minor/patch triple against the [OpenSSL security advisories](https://www.openssl.org/news/vulnerabilities.html) before cutting a release build; the string is the canonical way to tell which CVE surface the deployed binary carries. The value is deterministic for a given build of this package: it reflects the `libcrypto` source vendored via `subtree.yaml` and is not read from any system-provided OpenSSL library. Across repeated calls, reference identity of the returned `String` is not guaranteed, but equality (via `==`) is. > Note: Because `libcrypto` is statically linked into the package, > this reports the *compiled-in* version. Applications that swap in > a different OpenSSL runtime at load time (not supported by this > package) would need to query that runtime directly.